const state = {
	visitedViews: [],
	cachedViews: [],
	iframeViews: [],
};

const mutations = {
	ADD_IFRAME_VIEW: (state, view) => {
		if (state.iframeViews.some((v) => v.path === view.path)) return;
		state.iframeViews.push(
			Object.assign({}, view, {
				title: view.meta.title || 'no-name',
			})
		);
	},
	ADD_VISITED_VIEW: (state, view) => {
		if (state.visitedViews.some((v) => v.path === view.path)) return;
		state.visitedViews.push(
			Object.assign({}, view, {
				title: view.meta.title || 'no-name',
			})
		);
	},
	ADD_CACHED_VIEW: (state, view) => {
		if (state.cachedViews.includes(view.name)) return;
		if (view.meta && !view.meta.noCache) {
			state.cachedViews.push(view.name);
		}
	},
	DEL_VISITED_VIEW: (state, view) => {
		for (const [i, v] of state.visitedViews.entries()) {
			if (v.path === view.path) {
				state.visitedViews.splice(i, 1);
				break;
			}
		}
		state.iframeViews = state.iframeViews.filter((item) => item.path !== view.path);
	},
	DEL_IFRAME_VIEW: (state, view) => {
		state.iframeViews = state.iframeViews.filter((item) => item.path !== view.path);
	},
	DEL_CACHED_VIEW: (state, view) => {
		const index = state.cachedViews.indexOf(view.name);
		index > -1 && state.cachedViews.splice(index, 1);
	},

	DEL_OTHERS_VISITED_VIEWS: (state, view) => {
		state.visitedViews = state.visitedViews.filter((v) => {
			return v.meta.affix || v.path === view.path;
		});
		state.iframeViews = state.iframeViews.filter((item) => item.path === view.path);
	},
	DEL_OTHERS_CACHED_VIEWS: (state, view) => {
		const index = state.cachedViews.indexOf(view.name);
		if (index > -1) {
			state.cachedViews = state.cachedViews.slice(index, index + 1);
		} else {
			state.cachedViews = [];
		}
	},
	DEL_ALL_VISITED_VIEWS: (state) => {
		// keep affix tags
		const affixTags = state.visitedViews.filter((tag) => tag.meta.affix);
		state.visitedViews = affixTags;
		state.iframeViews = [];
	},
	DEL_ALL_CACHED_VIEWS: (state) => {
		state.cachedViews = [];
	},
	UPDATE_VISITED_VIEW: (state, view) => {
		for (let v of state.visitedViews) {
			if (v.path === view.path) {
				v = Object.assign(v, view);
				break;
			}
		}
	},
	DEL_RIGHT_VIEWS: (state, view) => {
		const index = state.visitedViews.findIndex((v) => v.path === view.path);
		if (index === -1) {
			return;
		}
		state.visitedViews = state.visitedViews.filter((item, idx) => {
			if (idx <= index || (item.meta && item.meta.affix)) {
				return true;
			}
			const i = state.cachedViews.indexOf(item.name);
			if (i > -1) {
				state.cachedViews.splice(i, 1);
			}
			if (item.meta.link) {
				const fi = state.iframeViews.findIndex((v) => v.path === item.path);
				state.iframeViews.splice(fi, 1);
			}
			return false;
		});
	},
	DEL_LEFT_VIEWS: (state, view) => {
		const index = state.visitedViews.findIndex((v) => v.path === view.path);
		if (index === -1) {
			return;
		}
		state.visitedViews = state.visitedViews.filter((item, idx) => {
			if (idx >= index || (item.meta && item.meta.affix)) {
				return true;
			}
			const i = state.cachedViews.indexOf(item.name);
			if (i > -1) {
				state.cachedViews.splice(i, 1);
			}
			if (item.meta.link) {
				const fi = state.iframeViews.findIndex((v) => v.path === item.path);
				state.iframeViews.splice(fi, 1);
			}
			return false;
		});
	},
};

const actions = {
	addView({ dispatch }, view) {
		dispatch('addVisitedView', view);
		dispatch('addCachedView', view);
	},
	addIframeView({ commit }, view) {
		commit('ADD_IFRAME_VIEW', view);
	},
	addVisitedView({ commit }, view) {
		commit('ADD_VISITED_VIEW', view);
	},
	addCachedView({ commit }, view) {
		commit('ADD_CACHED_VIEW', view);
	},
	delView({ dispatch, state }, view) {
		return new Promise((resolve) => {
			dispatch('delVisitedView', view);
			dispatch('delCachedView', view);
			resolve({
				visitedViews: [...state.visitedViews],
				cachedViews: [...state.cachedViews],
			});
		});
	},
	delVisitedView({ commit, state }, view) {
		return new Promise((resolve) => {
			commit('DEL_VISITED_VIEW', view);
			resolve([...state.visitedViews]);
		});
	},
	delIframeView({ commit, state }, view) {
		return new Promise((resolve) => {
			commit('DEL_IFRAME_VIEW', view);
			resolve([...state.iframeViews]);
		});
	},
	delCachedView({ commit, state }, view) {
		return new Promise((resolve) => {
			commit('DEL_CACHED_VIEW', view);
			resolve([...state.cachedViews]);
		});
	},
	delOthersViews({ dispatch, state }, view) {
		return new Promise((resolve) => {
			dispatch('delOthersVisitedViews', view);
			dispatch('delOthersCachedViews', view);
			resolve({
				visitedViews: [...state.visitedViews],
				cachedViews: [...state.cachedViews],
			});
		});
	},
	delOthersVisitedViews({ commit, state }, view) {
		return new Promise((resolve) => {
			commit('DEL_OTHERS_VISITED_VIEWS', view);
			resolve([...state.visitedViews]);
		});
	},
	delOthersCachedViews({ commit, state }, view) {
		return new Promise((resolve) => {
			commit('DEL_OTHERS_CACHED_VIEWS', view);
			resolve([...state.cachedViews]);
		});
	},
	delAllViews({ dispatch, state }, view) {
		return new Promise((resolve) => {
			dispatch('delAllVisitedViews', view);
			dispatch('delAllCachedViews', view);
			resolve({
				visitedViews: [...state.visitedViews],
				cachedViews: [...state.cachedViews],
			});
		});
	},
	delAllVisitedViews({ commit, state }) {
		return new Promise((resolve) => {
			commit('DEL_ALL_VISITED_VIEWS');
			resolve([...state.visitedViews]);
		});
	},
	delAllCachedViews({ commit, state }) {
		return new Promise((resolve) => {
			commit('DEL_ALL_CACHED_VIEWS');
			resolve([...state.cachedViews]);
		});
	},
	updateVisitedView({ commit }, view) {
		commit('UPDATE_VISITED_VIEW', view);
	},
	delRightTags({ commit }, view) {
		return new Promise((resolve) => {
			commit('DEL_RIGHT_VIEWS', view);
			resolve([...state.visitedViews]);
		});
	},
	delLeftTags({ commit }, view) {
		return new Promise((resolve) => {
			commit('DEL_LEFT_VIEWS', view);
			resolve([...state.visitedViews]);
		});
	},
};

export default {
	namespaced: true,
	state,
	mutations,
	actions,
};
